7. Write an expression that is equivalent to

Mathematics

1 answer:

Alborosie3 years ago

7 0

Answer:

5r - 40

Step-by-step explanation:

If you simplify 5(r - 8), you will get 5r - 40. This is called distributed property.

Hope this helps, thank you !!

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Rod's scores on 4 history tests are 88,96,98,and 90. What score does he need on the fifth test to have a mean score of 94 on all

aleksandrvk [35]

(88+96+98+90+x)/5=94
Add all the numbers
(372+x)/5=94
Multiply both sides by 5
372+x=470
Subtract 372 from both sides
x=98

Double check:
88+96+98+90+98=470/5=94

Hope that helps

7 0

3 years ago

Read 2 more answers

Na dives into a pool off of a springboard high dive. Her height (in meters above the water), x xx seconds after diving, is model

Anna71 [15]

Answer:

Step-by-step explanation:

What you have here is the factored form of the quadratic

$ax^2+bx+c$

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